What is sustainable design and construction?

“Sustainable design is not just lower energy bills. It is health, comfort, moisture safety, and long-term performance.”We sat down with Marcus Strang, Technical Lead in Passivhaus at HIP V. HYPE, to explore what sustainable building design really means in practice. With a PhD from the University of Queensland and deep expertise in building science, Marcus shares how Passive House design is helping shape healthier, more energy efficient buildings in Australia.We unpack how Passivhaus principles go far beyond energy efficiency. This conversation covers thermal comfort, indoor air quality, moisture safety, and why high-performance homes need to respond to Australia’s diverse climate zones. Marcus explains how sustainable architecture is not about applying one formula everywhere, but about designing buildings that perform properly in their specific environment.A major focus of the episode is hygrothermal modelling and moisture movement in engineered timber buildings, including CLT construction. Marcus shares why condensation risk, mould prevention, and long-term durability are critical parts of sustainable construction, especially in hot and humid climates. If you care about building performance, timber construction, and low-energy design, this part of the conversation is especially valuable.We also talk about the bigger picture for the construction industry. How technical expertise, early design decisions, and better collaboration can help drive net zero carbon outcomes and more resilient buildings. If you are interested in Passive House Australia, sustainable design, building science, energy-efficient homes, and the future of high-performance construction, this episode is packed with practical insight.👇 CHAPTER MARKERS 👇00:00 Intro01:58 Favourite Passive House Build03:19 Meet Marcus Strang04:05 What Is High Performance07:44 Passive House In Humid Environments12:41 ERVs And Dehumidification14:08 Why Schools Need It20:30 Commercial Modelling And Roles22:52 Conflicts And Certification23:37 Avoiding Certification Failures25:29 Common Airtightness Mistakes27:07 Moisture Risk in Cavities27:29 Ventilated Brick Drainage28:22 Photo Checklist Workflow29:52 First Home Retrofit Plan33:12 Low Cost Efficiency Upgrades34:40 Step by Step Passive Retrofit35:01 Windows and Air Quality37:41 External Insulation Debate42:06 Airtightness Without Intello46:20 Apprentice Mindful Moment48:44 Embodied Energy Tooling50:57 EasyPH Controversy52:14 Wrap Up and ThanksLINKS:Connect with Marcus:https://hipvhype.com/our-approach/our-people?t=marcus-strangOur Sponsors:Pro Clima - https://mindful-builder.captivate.fm/proclimaMEGT - https://mindful-builder.captivate.fm/megtConnect with us on Instagram: @themindfulbuilderpodConnect with Hamish:Instagram: @sanctumhomesWebsite: www.yoursanctum.com.au/Connect with Matt: Instagram: @carlandconstructionsWebsite: www.carlandconstructions.com/Mentioned in this episode:Proclima Sponsor